Italian bioengineer Giuseppe Scionti from Spanish startup Novameat has invented the "world's first" 3D-printed meat-free steak made from vegetable proteins, which mimics the texture of beef. From a report: Vegan ingredients such as rice, peas and seaweed, which provide the amino acids needed for a healthy diet, are turned into a food paste that is 3D-printed to form a raw, steak-like substance. Despite an abundance of meat-free products already on the market that taste similar to animal meats, Scionti found that these are limited to imitation burgers, chicken nuggets or meatballs. None of the offerings reproduce a piece of "fibrous flesh" such as steak or chicken breast. In an effort to reduce the impact of animal agriculture and to improve people's nutrition, the Milanese researcher set out to create a plant-based alternative to "fleshy" meat products.

Major dark web drug suppliers have started to voluntarily ban the synthetic opioid fentanyl because it is too dangerous. "They are 'delisting' the high-strength painkiller, effectively classifying it alongside mass-casualty firearms and explosives as commodities that are considered too high-risk to trade," reports The Guardian. From the report: Vince O'Brien, one of the NCA's leads on drugs, told the Observer that dark web marketplace operators appeared to have made a commercial decision, because selling a drug that could lead to fatalities was more likely to prompt attention from police. It is the first known instance of these types of operators moving to effectively ban a drug.

O'Brien said: "If they've got people selling very high-risk commodities then it's going to increase the risk to them. There are marketplaces that will not accept listings for weapons and explosives -- those are the ones that will not accept listings for fentanyl. Clearly, law enforcement would prioritize the supply of weapons, explosives and fentanyl over, for example, class C drugs -- and that might well be why they do this. "There are also drug users on the dark web who say on forums that they don't think it's right that people are selling fentanyl because it is dangerous and kills a lot of people."

An anonymous reader quotes a report from Quartz: Far fewer [monarch butterflies] were heading south this year, and those that have arrived did so a month late, according to Xeres, a non-profit conservation group for invertebrates. One researcher said it was the fewest monarch butterflies in central California in 46 years. Surveyors at 97 sites found only 20,456 monarchs compared to 148,000 at the same sites last year, an 86% decline. It's possible more insects will make the journey late this year, says Xeres, but that now seems unlikely. The minimum population size before the species experiences "migration collapse" is unknown, but a 2017 modeling paper in Biological Conservation (pdf) found that 30,000 butterflies adult butterflies are probably the smallest viable population. Without this critical mass, there aren't enough insects in the western monarch population to continue one of the world's most remarkable lifecycles.

Will Moore's law really come to an end by 2025? Maybe not...

An anonymous reader quotes IEEE Spectrum: [R]esearchers at RMIT University in Melbourne, Australia, believe a metal-based field emission air channel transistor (ACT) they have developed could maintain transistor doubling for another two decades. The ACT device eliminates the need for semiconductors. Instead, it uses two in-plane symmetric metal electrodes (source and drain) separated by an air gap of less than 35 nanometers, and a bottom metal gate to tune the field emission. The nanoscale air gap is less than the mean-free path of electrons in air, hence electrons can travel through air under room temperature without scattering...

Using metal and air in place of semiconductors for the main components of the transistor has a number of other advantages, says Shruti Nirantar, a Ph.D. candidate in RMIT's Functional Materials and Microsystems Research Group. Fabrication becomes essentially a single-step process of laying down the emitter and collector and defining the air gap. And though standard silicon fabrication processes are employed in producing ACTs, the number of processing steps are far fewer, given that doping, thermal processing, oxidation, and silicide formation are unnecessary. Consequently, production costs should be cut significantly. In addition, replacing silicon with metal means these ACT devices can be fabricated on any dielectric surface, provided the underlying substrate allows effective modulation of emission current from source to drain with a bottom-gate field. "Devices can be built on ultrathin glass, plastics, and elastomers," says Nirantar. "So they could be used in flexible and wearable technologies."
The article also suggests ACT devices could become important in space exploration, since electrons would be unaffected by extraterrestrial vacuums and radiation.

Nirantar was lead author on a new paper published in Nano Letters, and believes that their new approach "means we can stop pursuing miniaturization, and instead focus on compact 3D architecture, allowing more transistors per unit volume."

Would you pay $200,000 for a ride into space? I ask beause billionaire Richard Branson "really, really wants you to believe he's going to send people to space -- and soon," reports Gizmodo. "In a new interview with CNN, the Virgin Group founder now says he's "reasonably confident" his spaceflight company can beat out competitors like Blue Origin and SpaceX with crewed trips to space before Christmas."

An anonymous reader quotes CNN: "We have a brilliant group of astronauts who literally believe 100% in the project, and give it their everything," he said. The first few trips to space will be flown by test pilots without anyone else on board. Branson says he will be the first passenger. Eventually, paying tourists will also make the trip....

The design and flight control systems of SpaceShipTwo were overhauled following a 2014 test flight crash that killed a co-pilot. Branson has said the accident made him question whether to continue pursuing his riskiest business venture. But the company said it received an outpouring of support, including from customers who had reserved $200,000 to $250,000 tickets to one day ride in SpaceShipTwo. Hundreds of people are still lined up for a shot. The flight will offer tourists a few minutes of weightlessness and views of Earth's curved horizon....

Branson is known to set deadlines that aren't met. Virgin Galactic has been developing SpaceShipTwo since 2004, and Branson initially said commercial rides would begin in 2007. Eleven years later, the firm is still working on getting its 600 customers into space. "Space is difficult. Rocket science is rocket science," Branson said. "I obviously would love to prove our critics wrong, and I'm reasonably confident that before Christmas, we will do so."
"We'll see," writes Gizmodo.